Gregg Housh, the most prominent member of Anonymous since he is the only one who has been publicly identified, talked to The Independent about how the hacker collective works in its attempt to stop ISIS’s online activity.

“Everyone loves to say ‘hacking,’ but what Anonymous is doing is just tons of research, identifying and monitoring everything out there that ISIS might use to communicate and recruit, and trying to get those channels shut down, be it Twitter accounts, Facebook pages, telegram channels,” he said. “They’re just trying to shut down their ability to talk to the public. I think it’s had a decent effect.”

Housh argued that it’s important to hit ISIS’s online presence in order to hinder the terrorist group’s ability to recruit new members.

“Do you know how hard it is to get followers on Twitter? They keep having to reintroduce new accounts,” he added. “I think shutting down their channels to talk to impressionable youth around the world is a smart move. It definitely creates more work for them. If just a few kids don’t get caught up, I’d be happy.” Furthermore, he said that anyone who spots ISIS activity online can help out by sharing that information with Anonymous or others.

Housh also touched on a different subject that made the news last week after another hacker confessed to having helped the FBI track down a hacker who became the leader of ISIS’s digital hacking arm. The U.S. government killed Junaid Hussain in a drone strike in August.

Asked how he feels about mourning a former friend-turned-terrorist, Housh said finding out “that Junaid went down that path really hit [me hard]. I just couldn’t believe one of our own was doing that.”

Hussain trained ISIS hackers to defend against Anonymous attacks. “They definitely got a lot of their skill set brought to them by someone who knew what he was doing,” Housh said.